OVERVIEW

These comments are submitted on behalf of the Cascade Renewable Transmission Project. Thank you for your consideration.

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Project Descriptions: Cascade Renewable Transmission Project is 1,100 MW with optional expansion up to 1,320 MW. 

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Scenarios Studied: Highly encourage NorthernGrid to study S to N on PDCI and NWACI and E to W over West of Cascade South and North paried scenario. This would build off BPA’s short term ATC Update from July 2025 where BPA highlighted the need for a California import scenario by modifying the Canadian entitlement return on stress scenarios to start with the firm rights on the AC and DC in the S to N direction instead of N to S. In addition, BPA has observed that customers have secured rights on the NWACI S to N and PDCI S to N to import California energy into the Pacific Northwest during peak hours. BPA does not currently study a California import scenario in its heavy load base cases and the impact of this short term ATC study case resulted in a significant derates to key flowgates such as Cross Cascade North, Cross Cascade South and North Of Pearl. Given the magnitude of these potential changes, we believe it is important for NorthernGrid to study this scenario. 

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Information Requests: 1) Please provide a table by region of where new resources are proposed and by type and 2) Please provide peak load assumptions by Member

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